Water analysis measurement arrangement

US9052282B2 · kind B2 · utility

Assignee

• HACH LANGE GMBH · DE

Inventors

• Michael Kussmann · Goldkronach, DE
• Lothar Heidemanns · Korschenbroich, DE
• Andreas Jonak · Meerbusch, DE
• Markus Hahn · Kempen, DE
• Heinz Rudde · Hückelhoven, DE
• Claudia Rieger · Halle (Saale), DE
• Axel Leyer · Rheydt, DE

Key dates

• Filing date: Aug 5, 2010
• Grant date: Jun 9, 2015
• Expiry date: May 2, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/4167
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A water analysis measurement arrangement for determining a concentration of ions and/or ionic compounds in an aqueous medium includes a closed buffer solution housing comprising a pH buffer solution. The closed buffer solution housing is configured to communicate with the aqueous medium via an electrolyte bridge. A reference electrode is arranged in the closed buffer solution housing. An amplifier ground is disposed on a ground electrode and is configured to directly contact the aqueous medium. A high-impedance amplifier comprises a first capacitive element arranged between the reference electrode and the amplifier ground. An AC voltage generator is arranged between the amplifier ground and the ground electrode. A measurement electrode is configured to directly contact the aqueous medium. A redundant unit comprises a separate low-impedance redundant electrode arranged in the closed buffer solution housing and a high-impedance redundant electrode amplifier comprising a second capacitive element to the amplifier ground.